Hey, thanks for your response.
I’m glad that it worked for you 
I’m not certain about it, because based on your code, I see, you have a
This line perhaps be the issue in your case (my assumption, I may be wrong) .I’m bit ignorant about this use case . I need to test this later and check your code. Apologies!
How about checking it in the other open posts related to Ag-Grid ? here’s a link
Goodluck,
Avra